The multi-wheel trolley type landing gear consists of a frame, a shock absorbing strut, a tie rod, a damper, a wheel frame and a wheel set. It is generally used on high-quality transport aircraft and passenger aircraft, and adopts multiple small-sized wheels instead of a single large one. The wheel improves the floatability of the aircraft, reduces the storage space, and ensures the safety of the aircraft when a tire is damaged.

Introduction

The aircraft that takes off and land is mainly the landing gear. It is an important bearing component of the aircraft. It is the device used to support the weight of the aircraft and bear the corresponding load when the aircraft is parked, slid, taken off, and landed on the ground. It can consume and absorb the impact energy of the aircraft during landing and running; realize the control and braking of the aircraft when it is running on the ground; slow down the vibration caused by the unevenness of the runway when the aircraft is running. With the development of the aviation industry, the landing gear has different structural forms. The main configuration includes frame type, rocker arm type, pillar type and multi-wheel type (car type) landing gear.

Trolley landing gear structure

With the development of the aviation industry, the main landing gear of heavy aircraft landing gear faces two problems that must be solved. First, the strength of the airport runway cannot meet the landing requirements of heavy aircraft, and the second is the increase of the diameter of the wheel. The collection of landing gear presents great difficulties. The use of trolley-type landing gear can solve these two problems well. The figure on the right shows the structure of the trolley landing gear. Among them: 1-retracting actuator; 2-buffer strut; 3-folding strut; 4-wheel set; 5-auxiliary buffer; 6-rear axle; 7-liner; 8- rear rocker arm; 9-low brake lever; 10-frame; 11-front axle; 12-up brake lever; 13-front rocker; 14-liner;